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Orbital ATK’s Cygnus OA-7 resupply craft departed the International Space Station on Sunday after a 43-day stay to head for a week-long free flight for the deployment of small CubeSats and the third iteration of NASA’s Spacecraft Fire Experiment that explores how large-scale fires spread in microgravity to improve the safety of future crewed spacecraft.

A critical science-enabling cargo delivery to the International Space Station was successfully sent on its way on Tuesday when a United Launch Alliance Atlas V rocket rumbled away from Florida’s Cape Canaveral to place the Cygnus cargo spacecraft into orbit.